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Python MySQL Delete From By

8 Python MySQL Delete From By

Python MySQL Delete From By

  • You can delete records from an existing table by using the “DELETE FROM” statement:
In [19]:
import mysql.connector
mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  passwd="",
  database="itronix"
)

mycursor = mydb.cursor()
sql = "DELETE FROM customers WHERE address = 'Otawa 4'"
mycursor.execute(sql)
mydb.commit()

print(mycursor.rowcount, "record(s) deleted")
1 record(s) deleted

Prevent SQL Injection

  • It is considered a good practice to escape the values of any query, also in delete statements.
  • This is to prevent SQL injections, which is a common web hacking technique to destroy or misuse your database.
  • The mysql.connector module uses the placeholder %s to escape values in the delete statement:
In [20]:
import mysql.connector
mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  passwd="",
  database="itronix"
)

mycursor = mydb.cursor()

sql = "DELETE FROM customers WHERE address = %s"
adr = ("dublin 4", )

mycursor.execute(sql, adr)
mydb.commit()

print(mycursor.rowcount, "record(s) deleted")
1 record(s) deleted

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